Academic Journal
Radiocaesium accumulation capacity of epiphytic lichens and adjacent barks collected at the perimeter boundary site of the Fukushima Dai-ichi Nuclear Power Station
| العنوان: | Radiocaesium accumulation capacity of epiphytic lichens and adjacent barks collected at the perimeter boundary site of the Fukushima Dai-ichi Nuclear Power Station |
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| المؤلفون: | Dohi, Terumi, Ohmura, Yoshihito, Yoshimura, Kazuya, Sasaki, Takayuki, Fujiwara, Kenso, Kanaizuka, Seiichi, Nakama, Shigeo, Iijima, Kazuki |
| المساهمون: | Mousseau, Tim A., MEXT Nuclear Energy S&T and Human Resource Development Project through Concentrating Wisdom, Grant-in-Aid for Challenging Exploratory Research of JSPS |
| المصدر: | PLOS ONE ; volume 16, issue 5, page e0251828 ; ISSN 1932-6203 |
| بيانات النشر: | Public Library of Science (PLoS) |
| سنة النشر: | 2021 |
| المجموعة: | PLOS Publications (via CrossRef) |
| الوصف: | We investigated the radiocaesium content of nine epiphytic foliose lichens species and the adjacent barks of Zelkova serrata (Ulmaceae, "Japanese elm") and Cerasus sp. (Rosaceae, "Cherry tree") at the boundary of the Fukushima Dai-ichi Nuclear Power Station six years after the accident in 2011. Caesium-137 activities per unit area (the 137 Cs-inventory) were determined to compare radiocaesium retentions of lichens (65 specimens) and barks (44 specimens) under the same growth conditions. The 137 Cs-inventory of lichens collected from Zelkova serrata and Cerasus sp. were respectively 7.9- and 3.8-times greater than the adjacent barks. Furthermore, we examined the radiocaesium distribution within these samples using autoradiography and on the surfaces with an electron probe micro analyzer (EPMA). Autoradiographic results showed strong local spotting and heterogeneous distributions of radioactivity in both the lichen and bark samples, although the intensities were lower in the barks. The electron microscopy analysis demonstrated that particulates with similar sizes and compositions were distributed on the surfaces of the samples. We therefore concluded that the lichens and barks could capture fine particles, including radiocaesium particles. In addition, radioactivity was distributed more towards the inwards of the lichen samples than the peripheries. This suggests that lichen can retain 137 Cs that is chemically immobilised in particulates intracellularly, unlike bark. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1371/journal.pone.0251828 |
| الاتاحة: | http://dx.doi.org/10.1371/journal.pone.0251828 https://dx.plos.org/10.1371/journal.pone.0251828 |
| Rights: | http://creativecommons.org/licenses/by/4.0/ |
| رقم الانضمام: | edsbas.4D72E532 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1371/journal.pone.0251828 |
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